1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Scatterlist Cryptographic API.
4 *
5 * Procfs information.
6 *
7 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
8 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
9 */
10
11#include <linux/atomic.h>
12#include <linux/init.h>
13#include <linux/crypto.h>
14#include <linux/fips.h>
15#include <linux/module.h>	/* for module_name() */
16#include <linux/rwsem.h>
17#include <linux/proc_fs.h>
18#include <linux/seq_file.h>
19#include "internal.h"
20
21static void *c_start(struct seq_file *m, loff_t *pos)
22{
23	down_read(&crypto_alg_sem);
24	return seq_list_start(&crypto_alg_list, *pos);
25}
26
27static void *c_next(struct seq_file *m, void *p, loff_t *pos)
28{
29	return seq_list_next(p, &crypto_alg_list, pos);
30}
31
32static void c_stop(struct seq_file *m, void *p)
33{
34	up_read(&crypto_alg_sem);
35}
36
37static int c_show(struct seq_file *m, void *p)
38{
39	struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
40
41	seq_printf(m, "name         : %s\n", alg->cra_name);
42	seq_printf(m, "driver       : %s\n", alg->cra_driver_name);
43	seq_printf(m, "module       : %s\n", module_name(alg->cra_module));
44	seq_printf(m, "priority     : %d\n", alg->cra_priority);
45	seq_printf(m, "refcnt       : %u\n", refcount_read(&alg->cra_refcnt));
46	seq_printf(m, "selftest     : %s\n",
47		   (alg->cra_flags & CRYPTO_ALG_TESTED) ?
48		   "passed" : "unknown");
49	seq_printf(m, "internal     : %s\n",
50		   (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
51		   "yes" : "no");
52	if (fips_enabled) {
53		seq_printf(m, "fips         : %s\n",
54			   (alg->cra_flags & CRYPTO_ALG_FIPS_INTERNAL) ?
55			   "no" : "yes");
56	}
57
58	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
59		seq_printf(m, "type         : larval\n");
60		seq_printf(m, "flags        : 0x%x\n", alg->cra_flags);
61		goto out;
62	}
63
64	if (alg->cra_type && alg->cra_type->show) {
65		alg->cra_type->show(m, alg);
66		goto out;
67	}
68
69	switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
70	case CRYPTO_ALG_TYPE_CIPHER:
71		seq_printf(m, "type         : cipher\n");
72		seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
73		seq_printf(m, "min keysize  : %u\n",
74					alg->cra_cipher.cia_min_keysize);
75		seq_printf(m, "max keysize  : %u\n",
76					alg->cra_cipher.cia_max_keysize);
77		break;
78	case CRYPTO_ALG_TYPE_COMPRESS:
79		seq_printf(m, "type         : compression\n");
80		break;
81	default:
82		seq_printf(m, "type         : unknown\n");
83		break;
84	}
85
86out:
87	seq_putc(m, '\n');
88	return 0;
89}
90
91static const struct seq_operations crypto_seq_ops = {
92	.start		= c_start,
93	.next		= c_next,
94	.stop		= c_stop,
95	.show		= c_show
96};
97
98void __init crypto_init_proc(void)
99{
100	proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);
101}
102
103void __exit crypto_exit_proc(void)
104{
105	remove_proc_entry("crypto", NULL);
106}
107